1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Feliz [49]
2 years ago
6

Solve by completing the square. x2-6x+8 Show solving steps please.

Mathematics
2 answers:
Karolina [17]2 years ago
6 0

Answer:

x = 2 , x = 4

Step-by-step explanation:

To solve the expression equate it to zero

x² - 6x + 8 = 0 ( subtract 8 from both sides )

x² - 6x = - 8

To complete the square

add ( half the coefficient of the x- term)² to both sides

x² + 2(- 3)x + 9 = - 8 + 9

(x - 3)² = 1 ( take square root of both sides )

x - 3 = ± \sqrt{1} = ± 1 ( add 3 to both sides )

x = 3 ± 1

Then

x = 3 - 1 = 2 or x = 3 + 1 = 4

devlian [24]2 years ago
4 0

Answer:

(x−2)(x−4)

Step-by-step explanation:

Let's factor x2−6x+8

x2−6x+8

The middle number is -6 and the last number is 8.

Factoring means we want something like

(x+_)(x+_)

Which numbers go in the blanks?

We need two numbers that...

Add together to get -6

Multiply together to get 8

Can you think of the two numbers?

Try -2 and -4:

-2+-4 = -6

-2*-4 = 8

Fill in the blanks in

(x+_)(x+_)

with -2 and -4 to get...

(x-2)(x-4)

Hope this helps! Also, if it's no trouble, can I have brainliest? Thanks! :D

You might be interested in
Write an equation in point-slope form for the line that satisfies the given set slope of 4/5, passes through (10,-30
hodyreva [135]

Answer:

y + 30 = 4/5(x - 10)

Step-by-step explanation:

Given the slope, 4/5, and point (10, -30):

We can plug these values into the point-slope form:

y - y1 = m(x - x1)

Let (x1, y1) = (10, -30)

and m = 4/5

y - (-30) = 4/5(x - 10)

y + 30 = 4/5(x - 10)

Therefore, the point-slope form is y + 30 = 4/5(x - 10)  

7 0
3 years ago
Help with 38 and 39 please!!<br> 15 pts!!!
fgiga [73]

Answer: X=-2 1/5, X=-1

Step-by-step explanation:

The distance from CF is 9 units, 1/5 that = 1 4/5, add that to -4 is -2 1/5.

The distance from BD is 6 units, 2/3 that =4, add that to -5 is -1.

Hope this helps!

3 0
3 years ago
Read 2 more answers
Witch has a greater absolute value 33 dollars and -52 dollars
lakkis [162]

Answer:

-52

Step-by-step explanation:

the absolute value is always positive and so 33 would remain 33, but -52 would change to 52 which is greater than 33.

6 0
3 years ago
Read 2 more answers
Which of the following can be directly measured using a ruler?
Mariana [72]

Answer:

C

Step-by-step explanation:

windows arent that big compared to 2 cities, distance between the and moon, or a height of a mountain. so i think C is the only reasonable answer

6 0
1 year ago
Read 2 more answers
3x+8 = 3x + ?<br><br> All values of x?
Eva8 [605]

Answer:  x=2

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Nick is going to solve a problem. Which question could he ask himself as part of understanding the problem? A. What do I want to
    13·1 answer
  • Change the fraction 7/12 to a decimal. Round your answer to the nearest thousandth
    15·2 answers
  • What is the quotient of ÷
    5·1 answer
  • A Mexican restaurant sells quesadillas in two sizes: a "large" 12 inch-round quesadilla and a "small" 5 inch-round quesadilla. W
    6·1 answer
  • Solve the inequality 4(a+6) &gt;= 5(a+3)
    11·1 answer
  • The newly elected president needs to decide the remaining 7 spots available in the cabinet he/she is appointing. If there are 13
    10·1 answer
  • Which line is congruent to which
    14·1 answer
  • FIND THE MEASURE OF ANGLE 2 PLEASE HELP ASAP!
    12·1 answer
  • Help me plz!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    5·2 answers
  • 200, 40,8,<br> Is this Arithmetic, geometric or neither
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!